I Was a Teenage Werewolf is a 1957 American science fiction horror film directed by Gene Fowler Jr., and starring Michael Landon as a troubled teenager, Yvonne Lime, and Whit Bissell. Co-written and produced by cult film producer Herman Cohen, it was one of the most successful films released by American International Pictures (AIP).

Plot

Tony Rivers, a troubled teenager at Rockdale High, has a short temper that gets him into numerous fights. Local police Detective Donovan advises Tony to talk with a psychologist who works at the local aircraft plant, Dr. Alfred Brandon, a practitioner of hypnotherapy. Tony declines, but his girlfriend Arlene, as well as his widowed father Charles, show concern about his violent behavior. At a Halloween party at the "haunted house", an old house at which teenagers hang out, Tony attacks his friend Vic after being surprised from behind. After seeing the shocked expressions on his friends' faces, he realizes he needs help and goes to see Dr. Brandon.